According to Ancestry's version of the 1851 & 1861 Census, this looks like the family:
Residing at Teth Fauld?, Denny
David Muirhead, age 30, Agricultural Labourer, born St. Ninians
Elisabeth Muirhead age 47
Jean Muirhead age 7
Mary Muirhead age 5
Robert Muirhead age 3
Catherine Muirhead age 1
1861 Census
Residing at Tethfauld, Denny
David Muirhead, age 60??, Agricultural Labourer, born St. Ninians
Mary Muirhead age 16
Catherine Muirhead age 10
Can't find David in 1871?